Global Patent Index - EP 4102503 A1

EP 4102503 A1 20221214 - DEVICE AND METHOD FOR A BANDWIDTH EXTENSION OF AN AUDIO SIGNAL

Title (en)

DEVICE AND METHOD FOR A BANDWIDTH EXTENSION OF AN AUDIO SIGNAL

Title (de)

VORRICHTUNG UND VERFAHREN ZUR BANDBREITENERWEITERUNG EINES AUDIOSIGNALS

Title (fr)

DISPOSITIF ET PROCÉDÉ D'EXTENSION DE LA LARGEUR DE BANDE D'UN SIGNAL AUDIO

Publication

EP 4102503 A1 20221214 (EN)

Application

EP 22183878 A 20090120

Priority

  • US 2512908 P 20080131
  • DE 102008015702 A 20080326
  • EP 2009000329 W 20090120
  • EP 17186509 A 20090120
  • EP 09705824 A 20090120

Abstract (en)

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a demicator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

IPC 8 full level

G10L 21/038 (2013.01)

CPC (source: EP US)

G10L 21/038 (2013.01 - EP US)

Citation (applicant)

  • WO 9857436 A2 19981217 - LILJERYD LARS GUSTAF [SE], et al
  • US 5455888 A 19951003 - IYENGAR VASU [CA], et al
  • US 95102997 A 19971015
  • US 6895375 B2 20050517 - MALAH DAVID [IL], et al
  • US 6549884 B1 20030415 - LAROCHE JEAN [US], et al
  • M. DIETZL. LILJERYDK. KJORLING0. KUNZ: "Spectral Band Replication, a novel approach in audio coding", 112TH AES CONVENTION, May 2002 (2002-05-01)
  • S. MELTZERR. BOHMF. HENN: "SBR enhanced audio codecs for digital broadcasting such as ''Digital Radio Mondiale", 112TH AES CONVENTION, May 2002 (2002-05-01)
  • T. ZIEGLERA. EHRETP. EKSTRANDM. LUTZKY: "Enhancing mp3 with SBR: Features and Capabilities of the new mp3PRO Algorithm", 112TH AES CONVENTION, May 2002 (2002-05-01)
  • E. LARSENR.M. AARTSM. DANESSIS: "Efficient high-frequency bandwidth extension of music and speech", AES 112TH CONVENTION, May 2002 (2002-05-01)
  • K. KAYHKO: "A Robust Wideband Enhancement for Narrowband Speech Signal", 2001, HELSINKI UNIVERSITY OF TECHNOLOGY, article "Artificial bandwidth extension"
  • R.M. AARTSE. LARSEN0. OUWELTJES: "A unified approach to low- and high frequency bandwidth extension", AES 115TH CONVENTION, NEW YORK, USA, October 2003 (2003-10-01)
  • E. LARSENR.M. AARTS: "Audio Bandwidth Extension - Application to psychoacoustics, Signal Processing and Loudspeaker Design", 2004, JOHN WILEY SONS, LTD.
  • E. LARSENR.M. AARTSM. DANESSIS: "AES 112th Convention", May 2002, article "Efficient high-frequency bandwidth extension of music and speech"
  • J. MAKHOUL: "Spectral Analysis of Speech by Linear Prediction", IEEE TRANSACTIONS ON AUDIO AND ELECTROACOUSTICS, vol. 21, no. 3, June 1973 (1973-06-01)
  • ERIK LARSENRONALD M. AARTS: "Audio bandwidth extension", 6 December 2005, JOHN WILEY & SONS
  • MARK DOLSON: "The phase Vocoder: A tutorial", COMPUTER MUSIC JOURNAL, vol. 10, no. 4, 1986, pages 14 - 27, XP009029676
  • L. LAROCHE, M. DOLSON: "Proceedings 1999 IEEE Workshop on applications of signal processing to audio and acoustics", 17 October 1999, NEW PALTZ, NEW YORK, article "New phase Vocoder techniques for pitch-shifting, harmonizing and other exotic effects", pages: 91 - 94
  • A. ROBEL: "Proceeding of the 6th international conference on digital audio effects (DAFx-03", article "New approached to transient processing interphase vocoder", pages: DAFx-1 - DAFx-6
  • MELLER PUCKETTE: "Phase-locked Vocoder", 1995, IEEE ASSP, article "Conference on applications of signal processing to audio and acoustics"

Citation (search report)

  • [AD] US 6549884 B1 20030415 - LAROCHE JEAN [US], et al
  • [AD] WO 9857436 A2 19981217 - LILJERYD LARS GUSTAF [SE], et al
  • [IA] ERIK LARSEN AND RONALD M. AARTS: "Audio Bandwidth Extension", 6 December 2005 (2005-12-06), XP002527508, Retrieved from the Internet <URL:http://ww3.interscience.wiley.com> [retrieved on 20090511]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 4102503 A1 20221214; EP 4102503 B1 20240724; EP 4102503 C0 20240724; AU 2009210303 A1 20090806; AU 2009210303 B2 20111110; BR PI0905795 A2 20171031; BR PI0905795 B1 20200422; CA 2713744 A1 20090806; CA 2713744 C 20150714; CN 101933087 A 20101229; CN 101933087 B 20140326; DE 102008015702 A1 20090806; DE 102008015702 B4 20100311; DK 3264414 T3 20220815; EP 2238591 A1 20101013; EP 2238591 B1 20170906; EP 3264414 A1 20180103; EP 3264414 B1 20220720; EP 4425492 A2 20240904; EP 4425492 A3 20241002; ES 2649012 T3 20180109; ES 2925696 T3 20221019; HK 1248912 A1 20181019; JP 2011511311 A 20110407; JP 5192053 B2 20130508; KR 101164351 B1 20120709; KR 20110007083 A 20110121; MX 2010008378 A 20100818; PL 3264414 T3 20221121; PT 3264414 T 20220912; RU 2010131420 A 20120210; RU 2455710 C2 20120710; TW 200939211 A 20090916; TW I515721 B 20160101; US 2011054885 A1 20110303; US 8996362 B2 20150331; WO 2009095169 A1 20090806

DOCDB simple family (application)

EP 22183878 A 20090120; AU 2009210303 A 20090120; BR PI0905795 A 20090120; CA 2713744 A 20090120; CN 200980103756 A 20090120; DE 102008015702 A 20080326; DK 17186509 T 20090120; EP 09705824 A 20090120; EP 17186509 A 20090120; EP 2009000329 W 20090120; EP 24189266 A 20090120; ES 09705824 T 20090120; ES 17186509 T 20090120; HK 18108266 A 20180627; JP 2010544618 A 20090120; KR 20107017069 A 20090120; MX 2010008378 A 20090120; PL 17186509 T 20090120; PT 17186509 T 20090120; RU 2010131420 A 20090120; TW 98102983 A 20090123; US 86509609 A 20090120